A library for creating and consuming Cron expressions. It supports some extended syntax.
Each field consists of some number of values, comma separated, indicating when the expression is a match. In addition to the regular: * Single value * Inclusive range of values * Wildcard
Expressions can also include: * Step ranges * Weekday nearest to Day of Month * Last Day of Month (with or without an offset) * Nth Day of Week * Last Day of Week